Practice Questions

Duration: 2 min

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Inside: a video lesson and guided study material.

Module outline

  1. Quantitative Aptitude: Ratio and Proportion (Ratios), Data Interpretation, Mixture and Alligation, Permutation and Combination, Number System, Sequence and Series (Series), Speed Time and Distance, Speed Mathematics and Basic Mathematics, Algebra, Percentage, Profit and Loss, Simple Interest and Compound Interest, Powers and Exponents (Surds and Indices), Time and Work, Mensuration and Geometry, Partnership
  2. Reasoning Ability: Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Data Sufficiency, Seating Arrangements, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Directions (Direction Test), Ranking, Order and Sequence, Syllogisms, Blood Relations, Puzzle Solving (Puzzles), Inequality, Machine Input-Output
  3. English Language: Vocabulary, Noun, Subject Verb Agreement (Verb Noun Agreement), Adjectives, Tenses, Comprehension / Reading Comprehension / Unseen Passages (Critical Reasoning) (Paragraph Questions), Cloze Test (Cloze Passage), Sentence Correction (Error Correction), Sentence Completion (Fill in the blanks), Sentence Re-arrangements (Para Jumbles) (Narrative Sequencing), Sentence Construction, Pronoun, Preposition, Conjunction, Adverb, Verb, Modals, Articles, Determiner, Interjection
  4. General Awareness: Evolution of Indian Banking (Banking & Financial Awareness), GK- Current Affairs, Static General Knowledge, Indian Economy
  5. C Concepts + MCQs (IT Specialist): C Programming by Yash Sir, C Language Core
  6. Java (IT Specialist): Java
  7. Python (IT Specialist): Python for Placements by Yash Sir, Python Basics
  8. OOPs (IT Specialist): Object Oriented Programming (OOPS)
  9. DBMS (IT Specialist): Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, ORDBMS, Database Security & Authorization, Query Processing & Optimization, Enhanced Data Models, Data Warehousing & Mining, Big Data Systems, NoSQL
  10. SQL (IT Specialist): SQL
  11. Software Engineering (IT Specialist): Fundamentals of Software Engineering, Software Requirements and Quality Assurance, Software Design, Estimation and Metrics, Software Testing, Software Maintenance and Configuration Management
  12. Data Structure (IT Specialist): Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing
  13. Operating System (IT Specialist): Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Deadlock, Threads & Process Creation, Memory Management, Virtual Memory, Disc Scheduling, File Management, Windows OS, Linux OS, Security, Distributed Systems, Virtual Machines
  14. Compiler Design (IT Specialist): Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  15. Computer Architecture (IT Specialist): Basics of COA, Floating Point Rep, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Register Transfer and Microoperations, Multiprocessors, Programming the Basic Computer
  16. Data Communication & Networking (IT Specialist): Introduction to CN, Data Communication, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware basics, Network Security
  17. Descriptive Test (Main Exam): English Writing Ability
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

The video lecture focuses on Context-Free Grammars (CFG), specifically analyzing grammar rules and their properties like ambiguity. The instructor begins by presenting a specific grammar with productions S -> (L)/a and L -> L,S/S displayed in orange text. He demonstrates the derivation of a string by constructing a parse tree, starting from the start symbol S and expanding non-terminals step-by-step to show how a specific sequence, likely (a,a,a), is generated. This visual demonstration helps clarify the recursive nature of the list structure defined by L. Later, the lecture transitions to a theoretical question regarding recursion. The instructor presents a multiple-choice question asking about the property of a grammar that is both left and right recursive for a non-terminal. He identifies Ambiguous as the correct answer, underlining it on the screen to emphasize the concept that simultaneous left and right recursion typically leads to ambiguity in parsing.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor explains a CFG with rules S -> (L)/a and L -> L,S/S. He draws a parse tree on the whiteboard, starting with S branching into (L), then expanding L into L,S recursively. He fills in the leaves with terminals like a and , to show the derivation of a string like (a,a,a). This section visually demonstrates how the grammar generates nested lists. He uses red ink to draw the tree structure, clearly showing the hierarchy of non-terminals and terminals. The instructor's hand movements guide the viewer through the expansion process, ensuring clarity in the derivation steps.

  2. 2:00 – 2:26 02:00-02:26

    The slide changes to a multiple-choice question: A grammar that is both left and right recursive for a non-terminal, is. The options are Ambiguous, Unambiguous, information is not sufficient to decide, and None of these. The instructor underlines option (a) Ambiguous, confirming that such a grammar is ambiguous. He gestures towards the screen while explaining the reasoning behind the answer. The text is clearly visible in orange font against a white background.

The lesson progresses from a practical example of deriving a string using a specific CFG to a theoretical concept about grammar properties. By first showing the parse tree for S -> (L)/a and L -> L,S/S, the instructor grounds the abstract idea of recursion in a concrete visual example. This sets the stage for the final question, which tests the understanding of how recursion types (left vs. right) affect the ambiguity of a grammar. The connection is that while the first example shows a specific structure, the final question generalizes the implications of recursive rules on the grammar's nature. The instructor effectively bridges the gap between syntactic derivation and formal language theory properties.

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